Structural Assessment

Following the recent failure of two gas-fired power station steel chimneys, Zenith would like to immediately bring to the attention of steel chimney owners our findings and recommendations to assist in identifying, analysing and refurbishing the areas of steel chimneys which may be particularly prone to high corrosion. Of particular note, there are two main issues, which will be applicable if you have steel chimneys, namely, chimney dampers and corrosion under insulation.

When it comes to the inspection, structural analysis, specialist access, repair and maintenance of industrial chimneys, Zenith is the leading industry specialist in the country with a world class in-house engineering team combined with highly qualified site operatives.

Please find below a link to our ‘Technical Alert’ which includes a dynamic time lapse of Zenith’s world class engineering approach combined with our industry leading onsite specialists safely dismantling the steel chimney.

Zenith provides a comprehensive guy wire service for structures such as flare stacks, steel chimneys and masts. In addition, we specify and supply complete guy wire requirements.

Our dedicated team of fully qualified inspection engineers also facilitate all on-site access requirements throughout the full length of the guy wires. Following the survey, all of the information obtained is fed back to our Structural Engineers who compile detailed inspection reports complete with recommendations.

Please refer to the list below for our full range of guy wire services.

• Inspection
• Maintenance & Repair
• Dismantling
• Lubricating
• Retention
• Supply and Replacement
• Verticality
• Magnetic Inspection (LMA and LF)

Magnetic Inspection (LMA and LF)
Of particular note is our Magnetic Inspection (LMA and LF) service. Electromagnetic tests provide valuable additional information on the condition of wire ropes and are regarded as a useful addition to the visual inspection, particularly, where difficult access precludes a meaningful visual survey.

The permanent magnets induce a magnetic field around the rope, any defect within the wire rope creates a stray field, and this is detected and recorded on the data logger.

• Flare Tip Replacement without the use of helicopters or cranes.
• Tip replacement using crane or Zenith’s purpose made lifting frame.
• All required rigging studies and temporary works design.
• Partial Rebuilds
• Tip supply
• All required supply and installation of tip components
• Supply and installation of thermocouples
• Removal and supply of all pilot lines, steam lines & expansion bellows
• Cladding and insulation works
• Supply and Installation of ladders and gantries
• Grit blasting and paint application.
• Qualified PCN operatives for UT, DPI & MPI inspection works
• Qualified site welding capability to:

BS EN 1090-3: 2019

BS EN 1090-2: 2018

BS EN 1090-1: 2009 and A1:2011

• Main Riser design and supply